{
    "entity":
    [
        ["duct-intake-south", "duct-intake"],
        ["duct-intake-west", "duct-intake"],
        ["duct-intake-north", "duct-intake"],
        ["duct-intake-east", "duct-intake"],
        ["duct-exhaust-south", "duct-exhaust"],
        ["duct-exhaust-west", "duct-exhaust"],
        ["duct-exhaust-north", "duct-exhaust"],
        ["duct-exhaust-east", "duct-exhaust"]
    ]
}